1. Have you noticed a significant performance decrease from 0.87 -> 0.9?

Yes

2. On a scale of 1 to 10, how would you rate your performance in 0.9.

8

3. Name three or more maps in 0.9 which result in the worst performance.

Fallujah West
Lashkar Valley
Dragon fly

4. From the maps mentioned above, state which specific areas/directions affect your performance the most.

Fallujah, areas which lag for me the most are areas where those huge smoke clouds are, or whenever I turn to an area where they are visible to me my FPS drops from 45 to 20
The same lag is also noticed when I place that type of smoke in maps in the editor.

Lashkar, Not sure, mainly anywhere firefights are taking place my FPS drops from 45 to 35.

Dragon Fly, I just get about 40 FPS average on there, specifically when inside the city and when looking at large forested areas.

5. Name any maps that you have no performance issues with.

All these maps can run 50-100 fps for me, maps that run under 50 are not incl.